The 22-year-old, who had only just recovered from a broken shoulder suffered last year, fell in the outrun after landing on the hill in Ramsau.
After being taken to hospital, scans showed Pittin had broken his ulna and radius close to the wrist and he now faces a four-week absence from the slopes.
Pittin will now target his home World Championship event in Val di Fiemme to make a return to action.
"It really hurts to drive back to the hospital with an athlete who had barely recovered from an injury," head coach Fabian Ebenhoch said.
"But what can we do, we will also get through this now and try to achieve the best possible result for the World Championships. We will see what's still possible there."